6626669 has 4 divisors (see below), whose sum is σ = 7573344. Its totient is φ = 5679996.

The previous prime is 6626657. The next prime is 6626677. The reversal of 6626669 is 9666266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9666266 = 2 ⋅4833133.

It is not a de Polignac number, because 6626669 - 2²⁰ = 5578093 is a prime.

It is a super-2 number, since 2×6626669² = 87825484071122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6626639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473327 + ... + 473340.

It is an arithmetic number, because the mean of its divisors is an integer number (1893336).

Almost surely, 2^6626669 is an apocalyptic number.

It is an amenable number.

6626669 is a deficient number, since it is larger than the sum of its proper divisors (946675).

6626669 is an equidigital number, since it uses as much as digits as its factorization.

6626669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946674.

The product of its digits is 139968, while the sum is 41.

The square root of 6626669 is about 2574.2317300507. The cubic root of 6626669 is about 187.8300580621.

The spelling of 6626669 in words is "six million, six hundred twenty-six thousand, six hundred sixty-nine".